Copyright © 2018 Authors. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. International Journal of Engineering & Technology, 7 (4.38) (2018) 379-382 International Journal of Engineering & Technology Website: www.sciencepubco.com/index.php/IJET Research paper Increasing the Accuracy of Measuring the Resistance of the Grounding System with an Electrodeless Method Maia Tugushi, Boris Karasiev, Gizo Partskhaladze, Madona Loria, Gocha Chavleshvili Batumi State Maritime Academy, associate professor maritime engineering faculty, Batumi, Georgia; Batumi Shota Rustaveli State University, assistant professor of technology faculty, Batumi, Georgia, e-mail-maia_tugushi@mail.ru electrical engineer, Batumi Shota Rustaveli State University, teacher of technology faculty, Batumi, Georgia,e-mail- kara-boris@yandex.com Batumi Shota Rustaveli State University, professor of technology faculty, Batumi, Georgia, e-mail-gizopar5@yahoo.com Batumi Shota Rustaveli State University, assistant professor of technology faculty, Batumi, Georgia, e-mail-madona.loria@bsu.edu.ge Batumi Shota Rustaveli State University, associate professor of technology faculty, Batumi, Georgia, e-mail-gocha.chavleshvili@bsu.edu.ge Abstract Recently, electrodeless methods of measuring the resistance of grounding devices have appeared, with the help of special clamps. But a large methodological error limits the possibility of their use, especially when rationing low resistances. The article shows the possibility to improve the accuracy of electrodeless measurement methods using commercially available measuring instruments. In electrical installations of telecommunication networks of buildings, structures and industrial enterprises, the form of the AC voltage signal of the industrial supply network (~220V, 50/60Hz) can be differ greatly from the sinusoidal for short periods of time. The causes of distortions are usually associated with a sudden change in the network load [1], for example, when you turn on a powerful electric motor, furnace, welding machine, etc. The occurrence of impulse overvoltages and interference caused by electromagnetic effects (lightning, switching, radio frequency and others) on low-voltage networks, not only leads to failure of electrical installations, cables, switchboards, but also to damage the terminal equipment and malfunction. This is due, primarily, to the saturation of modern buildings and structures with information, telecommunications and other digital equipment, which has a very low level of protection against impulse overvoltages and interference. All this makes it necessary to carry out appropriate protective measures. To reduce interference, it is necessary to perform a separate (working) ground loop, the resistance of which must be measured and periodically monitored. There are devices that allow an electrodeless method to monitor and evaluate the resistance of the ground loop. But these devices have a greater measurement error than devices that measure the resistance of the earth electrode method. The article deals with existing instruments (CA6410, MZC-303E) which can evaluate the resistance of the earth electrode and the possibility of increasing the accuracy of the measurement with the help of special current clamps is shown. Using a predetermined value of neutral impedance, the measurement error of the calculated resistance of the earthing switch can be determined with great accuracy. Keywords: measurement accuracy, earthing/grounding, resistance, electrodless method. 1. Introduction The main parameters of electrical safety include: insulation resistance, resistance of grounding devices (GD), and contour resistance "phase-zero" [2]. Periodic monitoring and measurement of electrical safety parameters is a mandatory requirement of safety regulations and rules ([3], [4], [5], [6]) for the technical operation of electrical installations ([7], [8], [9]). For these purposes, the world market offers a large selection of devices that guarantee the necessary accuracy of measurements, provided that the user meets certain operating conditions. Unfortunately, these conditions are not always feasible. In particular, instruments for measuring the resistance of the grounding device, in addition to the performance of the climatic conditions of operation, require the specific placement of current and potential electrodes (metal pins jammed into the ground) relative to the investigated ground contour (depending on the geometric dimensions of the circuit) and set the maximum permissible earth resistance of the electrodes themselves (depending on the resistivity of the soil in which they are placed). In the central part of any city, where the saturation of buildings and underground utilities is high, solid asphalt or concrete, the application of these devices becomes impossible. 2. Main text 2.1. Problem Definition In such cases, reckoning methods are used to determine the resistance of the GD, given the known geometric dimensions of the